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Discuss the various sampling methods we might use in determining which items to include in a sample?
What are the basic assumptions underlying multiple means test, and why do they matter?
Find the minimum sample size n needed to estimate u for the given values of c, s, and e
One-tail hypothesis, testing the claim that the true mean is 36 lb? Explain how the tail, upper or lower, is dictated by the point estimate. Two-tail hypothesis, testing the claim that the true mean
To test at the 5% level of significance, whether the true proportion of diabetics in the state of Florida between the ages of 18 and 44 years is 15%. It is shown that out of 1,260 diabetics in the s
However, if she gives a medium or easy test, there is a 0.5 probability that her next test will be of the same difficulty and a 0.25 probability for each of the other two levels of difficulty. Const
Use a normal curve to estimate the probability that the average age of the houses receiving the brochure is greater than 45 years.
To estimate the average age of a breast cancer patient, a random sample of 17 patients were selected from a large database. It was found that the point estimate is 65 years old with a sample standar
A warped coin has probability of 0.5 of landing Heads, probability of 0.3 of landing Tails, and probability 0.2 of landing on its Edge. It is flipped 5 times. What is the probability that more Heads
Describe what a Type I error would mean in the context of this problem.
The mathematics department is interested in observing the performance of their first-year undergraduate students. The performance in mathematics of all freshmen in college is compared with their pe
Build a 95% confidence interval for the difference in population menas, assuming that the population variances are equal. Please show work.
A simple random sample of 25 recent graduates from a particular college gives a sample mean starting salary of $24,000 with a sample standard deviation of $3,000. Build a 95% confidence interval for
A summary of the responses is shown in the table below. Can you conclude there is a relationship between marital status and alcoholic classifications? Test using=.05. Use traditional and p-value app
Conduct hypothesis test using\alpha¡=.05. Use traditional and p-value approach to hypothesis testing.
A statistics professor assigned various grades during the semester including a midterm exam (out of 100 points) and a logistic regression project (out of 30 points). The prediction equation below wa
X is a normally distributed random variable with mean 10 and varinace 24.
Suppose the first three crads are of the same denomination. What is the probability that this player will end up with either four of a kind or a full house (three crads of one denomination and two o
An urn contains nine white balls and 11 black balls. A ball is drawn and replaced. If the ball is white your opponent pays you 25 cents. If it is black you pay him 25 cents. You have one dollar and
John is a student in this class. What is the probability that at least one other student in the class has John's birthday (day and month, but not necessarily the year)?
Use the .05 significance level and the five-step hypothesis-testing process to check if the there is a difference in the mean flight times. Develop a 95% confidence interval for the difference in th
A bank branch wants to estimate the proportion of all customers who visit the bank primarily to use the outdoor ATM. In a random sample of 300 customers, 223 had come to the branch primarily to use
You are trying to estimate the number of CSN students with iPhones. A random sample of 130 students reveals that 65 of them have an iPhone. Estimate the percentage of all CSN students who have iPhon
In 2010, a Gallup poll surveyed 1016 households in the U.S about their pets. Of those surveyed, 599 said they had at least one dog or cat as a pet. Find and interpret the 95% confidence interval for